Wavehunter

If we don't get a good deal at Copenhagen or soon after then the world could warm six degrees C (11 degrees F) in 90 years.

In such a scenario Italy and Spain would become part of the Sahara desert, Mexico and India would be uninhabitable, and places like Britain, Canada and Argentina would have to feed and house billions.

Can the human race adapt to such changes without creating the tensions to spark a nuclear holocaust? I doubt it. This threat to our very existence is why we need to start working together to prevent climate change and not let a few dozen corrupt US Senators destroy the future for all our children.

It happened after the Indian Ocean tsunami and it's happening again with world hunger: rich country governments hit the headlines with generous promises, then fail to deliver. In this case, $20bn to help reduce the number of people hungry shrinks to $3bn.

This ambitious petition seeks to keep politicians to their word. Well, there's a first time for everything.

(Almost 13,000 signatures at time of writing.)

The US congress is set to dismiss Judge Goldstone's report, which criticises both Israel and Hamas for conduct in the conflict in Gaza ... without even reading it.

Zionist Richard Goldstone (above), has done a pretty good job of being an honest broker, bringing out the facts. At least one US politician, Keith Ellison, salutes him for it. The rest are paid handsomely to vote based on prejudice, not on evidence or principles.

Robert Mugabe has seized Zimbabwe's diamond fields and is using the profits to fuel violent political conflict.

Here's a petition to the diamond regulators, who meet this week: Zimbabwe diamonds do not comply with Kimberley standards, nor can they be certified 'conflict-free'. Suspend Zimbabwe from the global diamond trade until the army pulls out of Marange, violence ends, abuses are investigated and Kimberley controls are upheld.

Gordon Brown is not too popular in the UK right now. Indeed, he looks likely to be a half-term Prime Minister, one of the few never to win a general election.

But if he succeeds in brokering a strong position for the EU at the UN climate change talks at Copenhagen, and if that position is adopted worldwide, and if as a result global warming is limited to two degrees...

History will remember him long after MPs expenses and the Iraqi and Afghan occupations are forgotten.

Temperatures could rise by more than 12 degrees C in some parts of the world during the next 50 years, according to UK scientists: that's if we do nothing to curb CO2 emissions. The British Environment Minister and Foreign Secretary came together to present the findings, which would mean a "high pressure" future of water and food shortages, mass migration and conflict in our children's lifetimes. Harvests of staples like maize, wheat and rice may decline 30% while the population rises 30%: a recipe for disaster.

In its MET office, the British Government has collected perhaps the world's best group of weather and climate experts. I take their forecasts seriously.

Above: David Milliband, Foreign Secretary, in front of the new interactive climate change map.

The Arctic's warming over the past century is unprecedented, according to scientists studying mud samples from beneath lakes on Canada's Baffin Island. The samples describe the island's climate over tens of thousands of years. With the Earth moving away from the sun of late, the last 8,000 years should have been getting colder - and they were, until about 1900.

I expect to see many comments from denialists at the foot of the page. Like fascists, Zionists and neocons, the dwindling number of denialists have had to become well organised in their bombardment of comment boards with half truths. They are always ready to name a handful of renegade scientists, who alone among thousands of charlatans see through the global warming hoax. Ha! Happily they won't be with us for long; we can get on with the task of rescuing civilisation much better without them.

Politicians talk of emissions targets but, as Jim Hansen says, unless all the remaining coal stays in the ground these will not be met. So the shelving of plans to build a new coal-fired power station in England must be good news for unborn generations.

Protests against the plant, such as the one pictured above, may have played a part in the decision.

Thanks to MrChampion.